src/adafruit_blinka/microcontroller/mcp2221/i2c.py

   1 # SPDX-FileCopyrightText: 2021 Melissa LeBlanc-Williams for Adafruit Industries
   2 #
   3 # SPDX-License-Identifier: MIT
   4 """I2C Class for MCP2221"""
   5 from .mcp2221 import mcp2221
   6
   7
   8 class I2C:
   9     """Custom I2C Class for MCP2221"""
  10
  11     def __init__(self, *, frequency=100000):
  12         self._mcp2221 = mcp2221
  13         self._mcp2221._i2c_configure(frequency)
  14
  15     def scan(self):
  16         """Perform an I2C Device Scan"""
  17         return self._mcp2221.i2c_scan()
  18
  19     # pylint: disable=unused-argument
  20     def writeto(self, address, buffer, *, start=0, end=None, stop=True):
  21         """Write data from the buffer to an address"""
  22         self._mcp2221.i2c_writeto(address, buffer, start=start, end=end)
  23
  24     def readfrom_into(self, address, buffer, *, start=0, end=None, stop=True):
  25         """Read data from an address and into the buffer"""
  26         self._mcp2221.i2c_readfrom_into(address, buffer, start=start, end=end)
  27
  28     def writeto_then_readfrom(
  29         self,
  30         address,
  31         buffer_out,
  32         buffer_in,
  33         *,
  34         out_start=0,
  35         out_end=None,
  36         in_start=0,
  37         in_end=None,
  38         stop=False,
  39     ):
  40         """Write data from buffer_out to an address and then
  41         read data from an address and into buffer_in
  42         """
  43         self._mcp2221.i2c_writeto_then_readfrom(
  44             address,
  45             buffer_out,
  46             buffer_in,
  47             out_start=out_start,
  48             out_end=out_end,
  49             in_start=in_start,
  50             in_end=in_end,
  51         )
  52
  53     # pylint: enable=unused-argument